<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
  <title>帮助中心</title>
  <!-- import CSS -->
  <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
</head>
<body>
  <div id="app">
    <el-collapse v-model="activeNames" @change="handleChange">
      <el-collapse-item title="常见问题1" name="1">
        <div>常见问题1常见问题1常见问题1</div><div>常见问题1常见问题1常见问题1</div>
      </el-collapse-item>
      <el-collapse-item title="常见问题2" name="2">
        <div>常见问题1常见问题1常见问题2</div><div>常见问题1常见问题1常见问题2</div>
      </el-collapse-item>
      <el-collapse-item title="常见问题3" name="3">
        <div>常见问题1常见问题1常见问题3</div><div>常见问题1常见问题1常见问题3</div>
      </el-collapse-item>
      <el-collapse-item title="常见问题4" name="4">
        <div>常见问题1常见问题1常见问题4</div><div>常见问题1常见问题1常见问题4</div>
      </el-collapse-item>
    </el-collapse>
  </div>
</body>
<!-- import Vue before Element -->
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<!-- import JavaScript -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<script>
  new Vue({
    el: '#app',
    data: function() {
      return { 
        activeNames: ['1']
      }
    },
    methods: {
      handleChange(val) {
        console.log(val);
      }
    }
  })
</script>
<style>
  .el-collapse-item__header {
    height: 50px;
    line-height: 50px;
    color: #323232;
  }
  .el-collapse-item__content {
    color: #646464;
  }
</style>
</html>